In the polar biomes, increasing depths of the permafrost and increasing infestations of bark beetles are the result of:
global climate warming. construction of the Alaska pipeline. forest fires. increased logging of the region.
In the polar biomes, increasing depths of the permafrost and increasing infestations of bark beetles are primarily the result of global climate warming. As temperatures rise, permafrost thaws, and warmer conditions can lead to increased bark beetle populations, which thrive in milder climates.